What would need to happen to complete a vaccine for the zika virus ?

There is no current medicine for the zika virus, but the best thing to do is to take medicine such as acetaminophen. There are many steps in creating a vaccine because the human body must be able to intake small amounts of zika virus. In a vaccine there is a small amount of the virus itself so that the human body can be ready to fight it off when it comes in contact with the virus. The human body currently cannot fight off the zika virus, but giving the body a very slight strand may provide immunization for the human body. I HOPE THIS HELPED:)

what's the question ?

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).